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Axially-Polarized Excitonic Series and Anisotropic van der Waals Stacked Heterojunction in a Quasi-1D Layered Transition-Metal Trichalcogenide.
Adv Sci (Weinh)
October 2024
Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, 106, Taiwan.
Anisotropic optical 2D materials are crucial for achieving multiple-quanta functions within quantum materials, which enables the fabrication of axially polarized electronic and optoelectronic devices. In this work, multiple excitonic emissions owning polarization-sensitive orientations are clearly detected in a multilayered quasi-1D ZrS nanoribbon with respect to the nanostripe edge. Four excitons denoted as A, A, A, and A with E ⊥ b polarized direction and one prominent A exciton with E || b polarized emission are simultaneously detected in the polarized micro-photoluminescence (µPL) measurement of 1.
View Article and Find Full Text PDFRoom Temperature Lattice Thermal Conductivity of GeSn Alloys.
ACS Appl Energy Mater
May 2024
Peter Gruenberg Institute 9 (PGI-9) and JARA-Fundamentals of Future Information Technologies, Forschungszentrum Juelich, Juelich 52428, Germany.
CMOS-compatible materials for efficient energy harvesters at temperatures characteristic for on-chip operation and body temperature are the key ingredients for sustainable green computing and ultralow power Internet of Things applications. In this context, the lattice thermal conductivity (κ) of new group IV semiconductors, namely GeSn alloys, are investigated. Layers featuring Sn contents up to 14 at.
View Article and Find Full Text PDFQuantum transport simulations of sub-5 nm bilayer GaOtransistor for high-performance applications.
J Phys Condens Matter
October 2023
Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi'an Technological University, Xi'an 710032, People's Republic of China.
Two-dimensional (2D) semiconductors with bizarre properties show great application potential for nanoscale devices, which is regarded as the Si alternation to extend the Moore's Law in sub-5 nm era. In this study, we investigate the electronic structure and ballistic transport characteristics of sub-5 nm bilayer (BL) GaOmetal-oxide-semiconductor field-effect transistor (MOSFET) using the first-principles calculations and the nonequilibrium Green's function method. Quasi-direct band structure with bandgap of 4.
View Article and Find Full Text PDFKagome-like BiP Monolayer: An Emerging Quasi-Direct Auxetic Semiconductor Coupled with High Anisotropic Mobility toward Visible-Light-Driven Photoelectrocatalytic pH-Robust Overall Water-Splitting.
Langmuir
September 2023
Department of Physics, University of Shanghai for Science and Technology, Shanghai 200093, People's Republic of China.
Two-dimensional (2D) Janus materials exhibit an outstanding potential that can meet the rigorous requirements of photocatalytic water splitting resulting from their unique atomic arrangement. However, these materials are quite scarce. Through ab initio density functional theory calculations, we introduce a kagome topology into the honeycomb lattice of blue phosphorene using phosphorus and bismuth atoms to build a hybrid honeycomb-like kagome lattice, realized by a hitherto unknown kagome-like Janus-like BiP monolayer with robust stability.
View Article and Find Full Text PDFA review and critical assessment of sedimentary metal indices used in determining the magnitude of anthropogenic change in coastal environments.
Sci Total Environ
January 2023
Geocoastal Research Group, School of Geosciences, The University of Sydney, NSW, Australia. Electronic address:
The current critical review examines the application of 11 frequently used sedimentary metal indices in their ability to accurately assess the magnitude of human-induced change (enrichment) in the highly vulnerable and intensely developed coastal environment. The plethora and rapidly increasing number of sedimentary metal indices should, if not derived for special purposes, produce a consistent assessment on the basis that they use the same suite of metals and concentrations. Inconsistent numerical results produced by different index formulations should, when combined with their associated classification scheme, produce a common assessment of environmental condition.
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